Chris Brown has been sent to jail after getting thrown out of rehab, according to reports.

The singer allegedly violated a judge's order to stay in a Malibu rehab centre while his Washington D.C. assault case ran its course.

According to TMZ, Chris was kicked out of the rehab facility on Friday morning after breaking "internal rules".

While it is not known what rule he broke, the outlet claims Chris did have an "inappropriate" relationship with one of the staff at the beginning of this month.

Being thrown out of the treatment centre means an immediate violation of his probation and Brown was said to have been picked up by L.A. County Sheriff's deputies and taken to jail.

The musician has been in the same rehab facility for the past four months, dealing with his anger management issues.

At his last court hearing on February 28, Brown got a glowing progress report from the centre, saying he was a model patient. It was also revealed in the same hearing that the singer was suffering from "an untreated mental health disorder, severe sleep deprivation, inappropriate self-medicating and untreated PTSD".

While there are no details on what Brown did to get thrown out of rehab, TMZ claims it had nothing to do with drugs or violence.

His recent legal troubles stem from his probation being revoked after he allegedly punched a man called Parker Adams in October.

He is also accused of assaulted a woman at a nightclub after his performance at Heat Ultra Lounge in Anaheim, California in June last year. Chris denies the incident, as does the owner of the club.

"Based on the information which we have gathered from our security company, mall security, and other party goers which were at HEAT on Saturday night; It is apparent that the alleged incident regarding Chris Brown is false," the owner told TMZ.